/**
 * Copyright 2020-2021 Huawei Technologies Co., Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef MINDSPORE_LITE_TOOLS_COMMON_PERSIST_FUTURE_H_
#define MINDSPORE_LITE_TOOLS_COMMON_PERSIST_FUTURE_H_

#include <future>

namespace mindspore::lite {
template <typename T>
class PersistFuture {
 public:
  PersistFuture() { future_ = promise_.get_future(); }

  void SetValue(T value) { promise_.set_value(value); }

  T GetValue() {
    if (future_.valid()) {
      value_ = future_.get();
    }
    return value_;
  }

 private:
  std::future<T> future_;
  std::promise<T> promise_;
  T value_;
};
}  // namespace mindspore::lite

#endif  // MINDSPORE_LITE_TOOLS_COMMON_PERSIST_FUTURE_H_
